RE: Controller Servlets?

It really depends on what the project involves.  If you are building an
application as opposed to a web page, you might want to consider
something like the Echo2 framework
(http://www.nextapp.com/platform/echo2/echo/).  If you are working on
something for a large company that requires a stable framework that has
been around longer, Struts is often the "required" framework.

Some others to consider (in no particular order):
 - Struts Shale w/JSF
 - Tapestry
 - WebWork (last I heard it was merging with Struts)
 - Spring WebFlow

There are a lot of options out there, and it is hard to recommend one
over the other without more details about the project.  Good luck, and
let us know what you decide on and why!

Shane